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Re: LF: Re: Band is open to VK!

To: <[email protected]>
Subject: Re: LF: Re: Band is open to VK!
From: "Fausto Coletti" <[email protected]>
Date: Sat, 22 Aug 2015 19:11:16 +0200
In-reply-to: <7E0C3B8C81574BB3B57589D478E1C624@White>
References: <[email protected]> <[email protected]> <A7071D422BDA4A209D082183FF6C2221@PCFausto> <[email protected]> <4A6A0C74F3624CCC93FC660782555B89@PCFausto> <7E0C3B8C81574BB3B57589D478E1C624@White>
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I know these documents and I know also how many detractors there have been and there are against the work of Guglielmo Marconi.
Now I'm not here to say if in December 1901 Marconi succeeded or not in his attempt, I'm convinced of it, the fact is that a year later
he successfully repeated the experiment with the same equipment, in front of numerous witnesses and people sent by his opponents.
On this there is no doubt.
As there is no doubt that all those who were opposed to Marconi claiming to be able to transmit a telegraphic signal before him,
when Marconi transmitted and receive to two or three hundred kilometers away, they were unable to to receive a signal to a hundred meters.
Here a documentary made by a German broadcaster few years ago:
 
 
This is one of the best documentaries I have ever seen and probably the closest to historical truth.
 
@ Stefan DK7FC
 
It is true that in 1901 there was the noise created by the man who today is present but, the noise generated by Mother Nature was also at that time.
Now I do not know what could be the relationship between the sensitivity of Marconi receiver in the 1901 environment, and a modern receiver with the noise of today.
I recently tested some nickel powder Coherer for a historical events which we are organizing for next month and I assure you that a carpenter's tack is more sensitive :-)
 
73, Fausto
 
 
 
 
 
 
 
----- Original Message -----
Sent: Saturday, August 22, 2015 6:07 PM
Subject: Re: LF: Re: Band is open to VK!

Hi Fausto, LF,
 
>> do not forget that in 1901 Guglielmo Marconi received a signal across the Atlantic at a frequency around 500 kHz
 
...did he really? I think there is some doubt around this story. With a coherer, it would be very hard to prove the difference between receiving a signal consisting of just three dots, and false triggering by random statics. Considering a situation where a success was badly needed, the reception may well have been the result of wishful thinking.
 
 
Today we'd simply say "show us the screenshot" ;-)
 
Best 73,
Markus
 

Sent: Friday, August 21, 2015 9:59 PM
Subject: Re: LF: Re: Band is open to VK!

:-)) I have a 8 motor drone but can fly only 20 minutes with one Kg payload.
A kite or baloon is better.
Seriously speaking, the difficulties are very big, as rightly says Stefan 160 meters band, has a very different behavior but, do not forget that in 1901 Guglielmo Marconi received a signal across the Atlantic at a frequency around 500 kHz and with a receiver that in comparison with those of today was a tack. Ok were "only" 3500 Km.
Today what are we doing more with our ultramodern equipment?
Today we have SDR, filters, DSP, noise reducer, Marconi at Signal Hill had a drop of mercury.
Today obtain a considerable power is relatively easy and inexpensive,
114 years ago there were only Ruhmkorff coils then, how much power was actually radiated
no one ever taken the trouble to measure it.
But as they did then my compatriot to get those great results: trying, trying and trying again trying to improve something every day.
The important thing is to think that nothing is impossible, maybe improbable but not impossible.
Tonight I bored with the history of telegraphy...:-)
 
73, Fausto IK4NMF
...

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